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mikroSDK Library

Power/Reset click

Rating:

5

Author: MIKROE

Last Updated: 2019-10-04

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: Capacitive

Downloaded: 3511 times

Not followed.

License: MIT license  

Power/Reset Click is equipped with two capacitive touch pads on a single click boardâ„¢. It can be activated by touch, and unlike the mechanical button, the capacitive touch button lasts much longer, it is not prone to damage and wear over time and it is very reliable.

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mikroSDK Library Blog

Power/Reset click

Power/Reset click

Native view of the Power/Reset click board.

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Power/Reset click

Power/Reset click

Front and back view of the Power/Reset click board.

View full image

Library Description

This library allows user to check which button is pressed or activated. Also initializes GPIO driver. For more details check documentation.

Key functions:

  • void touchbutt_gpioDriverInit(T_TOUCHBUTT_P gpioObj) - This function initializes GPIO driver.
  • T_TOUCHBUTT_STATE touchbutt_getPWR( void ) - This function returns a state of the PWR pin (ON/OFF button).
  • T_TOUCHBUTT_STATE touchbutt_getRST( void ) - This function returns a state of the RST pin (RESET button).

Examples description

The application is composed of three sections :

  • System Initialization - Initializes peripherals and pins.
  • Application Initialization - Initializes GPIO driver and performs a timer interrupt configuration.
  • Application Task - (code snippet) - Checks the states of the PWR and RST pins and performs a control of the timer counter depending on the pressed button (pins state). User can start and stop a timer counter, in the resolution of 100ms, by pressing the ON/OFF button. Also can reset a timer counter to 0 by pressing the RESET button. When timer counter was reached the target time (in seconds), a message will be sent to the uart terminal and the sound will be generated. Timer counter state will be showed to the uart terminal.
void applicationTask()
{
    pwr_state = touchbutt_getPWR();
    rst_state = touchbutt_getRST();
    
    if ((pwr_state == _TOUCHBUTT_ACTIVE) && (time_cnt_prev != time_cnt) && (rst_state == _TOUCHBUTT_INACTIVE))
    {
        time_val_dec = time_cnt / 10;
        time_val_real = time_cnt % 10;
        
        LongWordToStr( time_val_dec, text );
        Ltrim( text );
        mikrobus_logWrite( text, _LOG_TEXT );
        mikrobus_logWrite( ".", _LOG_TEXT );
        ByteToStr( time_val_real, text );
        Ltrim( text );
        mikrobus_logWrite( text, _LOG_LINE );
        
        if ((time_val_dec >= target_time) && (alarm_flag == _TOUCHBUTT_ACTIVE))
        {
            mikrobus_logWrite( "** Target time is reached! **", _LOG_LINE );
            alarm_flag = _TOUCHBUTT_INACTIVE;
            
            Sound_Play( 1000, 50 );
            Delay_ms( 40 );
            Sound_Play( 1000, 50 );
            Delay_ms( 40 );
        }
    }
    
    if (rst_state == _TOUCHBUTT_ACTIVE)
    {
        time_cnt = 0;
        alarm_flag = _TOUCHBUTT_ACTIVE;
    }
    else
    {
        time_cnt_prev = time_cnt;
    }
}


The full application code, and ready to use projects can be found on our LibStock page.

Other mikroE Libraries used in the example:

  • Conversions
  • C_String
  • Sound
  • UART

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.

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